From: "Clemens Paul" <cpaul@gmx.net>
To: <rsgb_lf_group@blacksheep.org>
References: <56E02A1B.9020309@abelian.org> <56FF7EC4.8020106@abelian.org>
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Date: Sat, 2 Apr 2016 12:00:10 +0200
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Subject: RE: LF: Another GPSDO
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Hi Paul,

for a comparison it might be worth to take a closer look also to this one
(also made in UK).
http://www.jrmiller.demon.co.uk/projects/ministd/frqstd.htm

73
Clemens
DL4RAJ 

>-----Original Message-----
>From: owner-rsgb_lf_group@blacksheep.org 
>[mailto:owner-rsgb_lf_group@blacksheep.org] On Behalf Of Paul Nicholson
>Sent: Saturday, April 02, 2016 10:12 AM
>To: rsgb_lf_group@blacksheep.org
>Subject: Re: LF: Another GPSDO
>
>
>I wrote:
>
> > 
>http://www.ebay.co.uk/itm/GPS-DISCiPLINED-CLOCK-GPSDO-10MHz-10M
>-OUTPUT-SQUARE-WAVE-RS232-OUTPUT-GPS-NMEA-s-/252011014153 
>
>
>
>After some trials I find this GPSDO is not so good after all.
>
>The 10MHz output is stable at about 9999999.9991 Hz, it appears
>locked by the GPS but at the wrong frequency due to some defect
>in the control loop.   It is apparently a known problem and
>appears on all the variations of BG7TBL's GPSDO.
>
>Another problem is that you cannot send RS232 commands to the GPS
>chip - its serial input is taken up by the on board controller.
>
>So I can't recommend this one.   It's a pity because it's a
>neat low cost unit.
>
>Now I'm about to buy one of these instead
>
>  https://www.tindie.com/products/nsayer/gps-disciplined-ocxo/
>
>--
>Paul Nicholson
>--
>